What is a “ST Nozzle Type Steam Trap”?
Benefits of ST Nozzle Type Steam Trap
Benefits
- Allows adjustment and tuning by changing nozzle
- Accommodate various flow volume with variety of nozzle types
- Integrated with the Operational Logic that brings the least steam leakage
- Minimize changes in pressure
- Superior tolerance
- Simple maintenance
An Issue in ST Nozzle Type Steam Trap and its Solution
Issue
Does not adjust to changes in condensate amount and in pressure
Solution
- When the pipe cubic volume is sufficient for changes in drain amount, constant discharge of average drain is
- Apply 2-3 count larger nozzle, as the resulting leakage is much less than that of using Mechanical
- (3) Employ the proposed System Approach for compulsory discharge via by-path
Principle of ST Nozzle Type Steam Trap
(1)Constantly and appropriately discharged through nozzle holes
(2)When drain amount is less, condensate is depressurized while running through narrow nozzle holes, transforming into flash steam and its cubic mass protect steam from leaking out
(3)Even if drain is minimal, steam leakage is minimal, as the nozzle holes are so narrow, steam density being 1/1700 of water and the kinetic viscosity if 73 times that of water
Unique ST Nozzle Typeʼs Operational Logic to Optimize
The key for optimizing is to appropriately “accumulate condensate”
Appropriate accumulation of drain at the pre-nozzle stage minimizes leakage The nozzle variety and empirical analysis of ST enables optimization
Non- ST Nozzle Type Steam Traps donʼt accumulate drain
Orifice/Nozzle traps of other manufacturers are not designed to accumulate condensate
Theoretical Backgrounds of ST Nozzle Type Steam Trap
And therefore a discharge amount will be 5.06 times larger, if other things being equal
When condensate is discharge for 1 min, the remaining 4.06min is for discharging steam
However, as the specific gravity of steam is 1/1700, and the kinetic viscosity is about 1/70, the mass of steam in this 4.06min will be1/70,
and therefore:
1＋(4.06/70)=1.06
The steam leakage is 6％
Even though a bigger nozzle with 5 times larger cross section area is employed, a significant leakage saving can be achieved as compare with Intermittent traps
ST Nozzle Type Steam Trap: Easy Tuning by Changing Nozzles
Steps to Change the Nozzle
Change the nozzle just by opening nozzle cap. Quick and easy change without stopping the system
Superior Tolerance and Easy Maintenance
Superior Tolerance
Superior tolerance as there is no moving part
Simple mechanical design with low parts count
Flash steam is less likely to affect the narrowest part, as it is located beyond the tunnel part
Easy Maintenance
Strainer is narrower than the nozzle pore size, and therefore there will be no
Strainer cleaning can easily flash out pipe scale
Variety of Nozzle Types and Customization
Accommodate Small to Extra Large
27 Standard Nozzles and customized nozzles to accommodate various flow volume
Main body size also has large diameter specifications (e.g. 100A) . Flexible design to accommodate various flange face, pressure specification, etc.
Patent Information on ST Nozzle Type Steam Trap
ST Nozzle Type Steam Trap Product Information
Sample Clients of ST Nozzle Type Steam Trap
Ohji Imaging Media
Okamoto Manufacturing
Kansai Beat Sugar
Kibun Foods
Coca Cola West Products
Komica Minolta
Sunstar
Suntory Products
Sanwa Oil
Showa Denko
Shimaya
Sugai Chemical
Sentral Glass Fiber
Sony Semi-conductors
Pacific Sugars
Dai-ichi Kogyo Pharmaceutical
Daido Chemical
Tonen General Oil
Tokyo Thermo Supply
Tomoku
Toray Co Ltd
Nihon Beat Sugar
Nichiban
Nisshin York
Fuji Oil
Shinki Wool
Hokushin
Maruha Nichiro Foods
Meiji
Meiwa Rubber
Yutaka Foods
LG Chem, Ltd.
And Many others